Problem with actual rendering and rendering view
Nothing wrong with the particles, but Squirrel gave the idea with the eyes not being visible. Yep the whole head is hidden behind giant Metaballs. Who would have thought!? Well I guess we can all sleep easier now :)



Going to guess you have a mean machine to handle all those particles - but if you want less effort when working you can dial the Display down to something easier like 10. Keeping the display and Render at the same amount can be taxing...



p.s. Either drag the Metaballs elsewhere or switch them to visible and move to another layer or turn off the Camera for each one...